DESCRIPTION
   The CAT3643 is a high efficiency Quad-Mode® fractional charge pump that can drive up to three LEDs programmable by a one wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.

FEATURES
◾ High efficiency 1.33x charge pump
◾ Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
◾ Drives up to 3 LEDs at 32mA each
◾ 1-wire EZDim™ LED current programming
◾ Power efficiency up to 92%
◾ Low noise input ripple in all modes
◾ “Zero” current shutdown mode
◾ Soft start and current limiting
◾ Short circuit protection
◾ Thermal shutdown protection
◾ Tiny 12-pad XQFN, 12-pad TDFN and 16-pad
   TQFN packages

APPLICATION
◾ LCD Display Backlight
◾ Cellular Phones
◾ Digital Still Cameras
◾ Handheld Devices
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